I'd love to see orgstat support something like http://sachachua.com/blog/2014/05/getting-r-ggplot2-work-emacs-org-mode-babel-blocks-also-tracking-number-todos/ out of the box. It would be very useful to see the trends over time for different keywords and tags. Ideally it would be possible to specify each data series using the same match syntax Org itself uses.